Oil-burning apparatus



lA. P. BROOMELL, DECD.

J. L- BROOMELL. EXECUTRIX'. OIL BURNING APPARATUS. APPLICATION FILED MAR. I9. |921. 1,428,181. Patented July-'18, 1922 3 SHEETS-SHEET l.

A. P. BR'OOMELL, DECD. J. L. BROOMELL. EXECUTRLX.

Ol-L BURNING APPARATUS. APFLICATAON FILED MAn.1 9,1921.

Patented July 18,A 1922..

3 SHEETS-SHEET 2.

ATTORNEYS 35 cally operable to discontinue the pneumatic STATES PATENT OFFICE.

ALBERT-PRESTON BROOMELL, 0F YORK, PENNSYLVANIA; JANET Ii. BROOMELL EXECUTRIX 0F SAID ALBERT P RESTON BROOMELL, DECEASED.

` OIL-BURNING APPARATUS. 'i

specification of Letters raient; l f Patented July 18, 1922 fppli'cation led March 19, 1921. SerialNo. 453,663.

To all ywhom. it may concern:

Be it known that I, ALBERT PRESTON BiiooMELL, a citizen of the United States, and a resident of York, in the county of York and. State of Pennsylvania, have invented certain new and useful Improvements in Oil-Burning Apparatus, of which the following is a specification. l

My inveiit-ion relates to oil burning apparatus and more particularly to an apparatus especially designed for ilse inconjunction with a boiler, the purpose of my invention being the provision of an apparatus having pneumatic means for feeding oil to the burner of the apparatus under pressure and delivering a blast of air to the burner to effeet atomization of the oil to lhighly combustible mixture.

It is also a purpose of my invention to provide .an oil burning apparatus which is constructed to permit of its ready application to any standard form of boiler furnace without necessitating the removal of more Ithan one section of the grate. and which .must be positioned so that its burner is in close proximity to the heating surface of the boi-ler so that loss of heat by radiation is prevented and the greatest heating efficiency obtained.

Furthermore, my invention provides positive means for preventing leakage of the oil supply valve comprised in the apparatus, automatic means for controllingr the pneumatic means to vary the heat intensity of the burner in accordance withk the steam pressure in the boiler, and means which is automatimeans should the burner-of the; apparatus be extinguished during continued operation of the apparatus.

I will describe one form of oil burning apparatus embodying my invention and will then point out the no vel features thereof in claims.

In the accompanying drawings:

Figures 1 and 1a are views showing a portion of a boiler and fire box having applied thereto one form of oil burning appatus embodying my invention.

Figures 2 and 2a are views showing in top plan the apparatus shown in Figure 1.

Figure 3 is ran enlarged vertical sectional view of the oil feedingmechanism embodied in the apparatus shown in the preceding views.

produce a- Figure 4 is'an enlarged detail v'sectional view of the burner embodied in the apparacasing 15, which is in communication with one end of an air line A. The air line A i'ncludesa section 16 preferably formed integral with the casing 15 and a separable section. 17 which is detachably connected to the section 16 by means of a. sleeve 18 that is secured to the section 16 and which carries a set screw 19 adapted to engage the section 17 for securing the two sections together. ,As

shown in Figures 1 and 1, the section 17 is in the form of a goose-neck or substantially Z-shaped form so as to permit of its ready application to the fire box of a boiler and to position a burner designated generally at B above the grate ofthe fire box and in close proximity to the lower side of the boiler.

As shown in Figure 4, the burner Bin the -presence instance comprises a nozzle 20 havling a conical bore and a pocket at the small end of the bore in which is centrally positioned a mixing nozzle 21 by means of a yoke 22 ofthe form shown in Figure 5. The mixnozzle 2l is provided with a double conical bore and a plurality of radially extending ducts 21a which communicate at their inner ends with the bore in the manner shown and which communicate at their outer ends with a groove 2lb. An oil line designated at L is connected to the yoke 22 and is in communication with the groove 2lb in the manner shown in Figure this oil line cornprising a plurality of sections of pipe so formed and connected as to provide a gooseneck portion 23 and an upwardly inclined portion 24, whichv latter is provided with a feed valve 25. The -upper end of the inclined portion 24 communicates with a reservoir motor M (Figure 2) and housed within a .pipe 26. As shown in Figure 3, the feed JEpipe tank T to which oil is supplied from a suit able source of supply (not shown) by a feed 26 communicates with the lower end o the tank T, and lthe passage of oil into the tank is controlled by a float-operated needle valve 27 including a stem 28 which projects upf wardly within the tank-andwhich is adapted to be en aged by a weight 29 to effect a closing of t e valve against the action of the float when certain conditions exist in the apparatus. The weight 29 is movably supported by means of a diaphragm 30 supported in a collar 31 carried by the upper end of the tank T. f

As shown in Figure 1, the reservoir tank T communicates with the section 16 of the upper end of the tank, while its lower endextends through the sleeve 18 and is so positioned within the section 16 as to deflect a portion of the draft created into t-he pipe upwardly into the tank. Y

As shown in Figures 1a and 2a, a flame pan N is positioned in advance of the burner B, the shape of which is such as to effect an upward deflection of the flame emanating 42 pivoted at the point indicated at 43 so as to engage an one of a plurality of contacts 44. Weig t 45 normally maintains the contact arm 42 in its lowermost position. The chain 41 is connected to the free end of the contact arm 42 so as `to be operated by the regulators D and H and to thereby is applied to the motor Mt from the lighting system, the potential vofwhich is determined' by the position of the contact arm 42 of the control switch. With the contact arm 42 engaging thelowermost contact 44, all of the resistance of the rheostat is interposed inthe circuit of the motor, and in the'practical construction of the apparatus this resistance is designed to allow of the actuation of the motor.` The motor M is of the variable speed type which has the advantage in its present use of reducing the Vflame from the burner and into direct contact with -emanating from the burner B without enthe under side of the boiler, as will be hereinafter described.` The pan N is provided with a pilot light 32 at a point adjacent to the burner B, and this pilot light is adapted to be fed with gas or oil to the source of supply through the medium of a pipe l35. The pan N is also provided with a drain outlet 36 that communicates with a bucket 37 through the medium 'of a pipe 38, the bucket being movably supported on a chain 39 trained over a pulley 40 and connected to an electric switch S. By this arrangement it will be seen that all unburnt oil in the pan N is conveyed tothe bucket 37, and when such accumulationbecomes excessive it serves to lower the bucket to effect an actuation of the switch S as will be more fully described hereinafter. f

Referring now to 'Figure 6, I have here with the boiler so that the oil burning apn paratus can be controlled to maintain a constant pressure within the boiler. This regulating means comprises'in the present in.- stance a control switch designated at K which is operatively connected to a damper regulator D and a heat regulator H through the medium of chains 41 in the manner shown. The switch K is in the form of a rheostat and includes a movable contact arm entire current from the lighting system to.

be conveyed to the motor M. Upon starting of the motor M, rotation of theA fan F vis effected and .in such direction' as to create a draft in the air line A in the direction of the burner' B. That portion of the air current which is deflected from the air line by means of the pipe P enters the upper end 'of the tank T and above the body of oil con-r tained therein, it-beingl understood that the operation of the needle Valve 'is such as to maintain a definite quantity of oil within the tank. Under the pressure created by the influx of air, the oil in the tank T is ejected to the burner through the fuel line L, it being particularly noted .that such forcible feeding is necessary because the reservoir tank T is disposed on a level below that of the burner B. The oil from the fuel line enters the mixing nozzle 21 and under the action of the air traversing the nozzle 20, an intermixing of the oil and air is effected with a simultaneous atomizing of the oil so that it leaves the burner in the 'form of atomized fuel. The pilot light 32 serves to ignite the atomized fuel from the burner B, with the flame impinging upon the curved sides of the pan N where it is deflected .upwardly into contact With the from the pipe P. As soon as the weight disengages the stem 28 of the valve 27,

" the floatV of the needle Valve operates to open the valve as .will be understood so that after the initial starting or' the apparatus, the needle valve will continue to regulate the supply of oil to the reservoir tank so as to maintain a definite quantity therein.l However, as soon as the air pressure to the tank ceases, the diaphragm returns to its normal position under the action of the weight 29 with the latter engaging thevalve stem 28 and thereby force the valve into closed position.

I 'float-operated needle valves as heretofore supplied `to the tank.

closed position do. not-effect the' complete closure of the port. However, by the provision of the weight 29 positive means is provided for completely closing the valve thus insuring the proper operation of the needle valve to Aregulate the amount of oil Vhen. excessive steam pressure exists in the boiler as a result of the continued operation of the oil burning apparatus, the damper regulator D operates to effect a lowering of the contact arm 42 under the action of the weight 45 thereby introducing resistance into the circuit of the motor and reducing the speed of the latter so that the rotational speed of the fan is correspondingly'reduced.

-With the reduction in speed of the fan, it

will be clear that the intensity of the air blast in they air line and pipe P is likewise reduced thus decreasing the amount of air and oil supplied to the burner B. This naturally reduces the fiame and heat intensity of the burner. Should steam continue to accumulate within the boiler, the Contact arm .42 will move to its lowern'lost position thereby effecting a stoppage of the motor and adiscontinuance of the oil supply to the burner.

TWhen an automatic temperature regulator of the Minneapolis vor Arco type is used to regulate or discontinue the fire when the room temperature in which the heating regulator is placed reaches a certain pre-determined temperature, the heat regulator will operate to lift the weight of the damper I consider this an important.I feature of my. invention because regulator and will' permit the weight on the arm of t-he rheostat to bring the contact arm of the rheostat down to the extreme bottom,

thus stopping the motor entirely and shutting off the '-'oil. lVhen the room temperature goes down the motor of the heat regulator will revolve one half turn, permitting the damper regulator weight to go down and pull up the arm of the rheostat and start up the motor.

To prevent continued operation of the apparatus after the burner has been extinguished, or when the pilot light fails to effect a lighting of the burner at the initial startingfof the apparatus, -it will be clear that the unburnt oil deposited in the flame pan N, will accumulate within the bucket 37 and thereby effect an opening of the switch S. lVhen the switch S is opened current is no longer supplied to the motor M so that the operation of the apparatus is discontinued. As a further tends from the reservoir tank T above the normal oil level within the tank so that'in the event the needle valve fails to operate properly While the fan F is in operation so that more oil is applied to the tank than the burner will consume, the surplus oil will be delivered to the bucket 37 so as to open the switch S and thus stop the motor.

In the application of the apparatus to a fire box,'the apparatus as a unit is supported for vertical adjustment to permit of its ap- `plication to fire boxes of various dimensions. To this end I provide a stand including a base 50, a standard 51 upon which is slidably fitted a sleeve 52 adapted to be locked in any position upon the stem by means of set screws 53. Integrally formed with the sleeve 52 is aplatform 54 upon which is supported the motor M in the manner shown in Figure 2. Bolted to they platform 54 is a panel 55 upon which is mounted the control switch K, the switch S and the necessary conductors for electrically connecting the switches to each other and to the motor. An arm 56 is sustained on the panel 55 and provides means for supporting the pulley 40.

safety, a drip pipe 46 is provided which eX- the grate' are designated at G in Figure l,

and it is to be noted that in order to apply the pan and burne-r to the fire boX it is only necessary to remove one section of the grate.

This permitsthe grate to be covered with bricks and sand, thus conning the heat from the burner above the grate and thereb preventing its radiation to the ash pit.

his not only increases the efficiency of the burner but also greatly reduces the noise produced by combustion. That space which is created by the removal of one grate seccations may be made herein Without departing from the spirit of the invention and the spirit and scoperof the appended claims.

Vhat I claim is: 1. An oil burning apparatus comprising, a burner, means for supplying air under pressure to the burner, an oil reservoir connected to andy disposed below the burner,-

means connecting the first means with the reservoir to causesaid means to force the oil from the reservolr to said burner, a source of oil supply connected to the reservoir, a. float operated control valve between the reservoir and the source of supply, and positive means acting to close said control valve, the last means being operable by the second means to allow of the opening of said control valve.

` 2. An oil burning apparatus comprising, a

burner, means for supplying air under pressure to the burner, an oil reservoir connected to and disposed below the burner, means connecting theA first means with the reservoir to cause said means to force the oil from the reservoir' to said burner, a source of oil supplyconnected to the reservoir, a control valve .between the reservoir and the source of supply, and a weighted diaphragm normally closing said control valve and associated with the second means so as to be ineffective to close the valve when the rst means is operated.

3. In an oil burning apparatus, an oil reservoir, a source ofvoil supply communieating with the reservoir, a float-operated reservoir and the source of oil supply, means reservoir, a burner above the reservoir, a

fuel line connecting the burner and reservoir, a float-operated valve controlling the passage of oil from the source of supply to the reservoir, positive means normally acting to close the valve, and pneumatic means Vfor forcing the oil from the reservoir to said burner and for rendering said means ineffective to close said valve.

-5. An oil burning apparatus comprising a burner, an oil reservoir connected to the burner, a source of oil supply connected to the reservoir, a control valve .between the continuously actuated to yieldingly maintain said control valve in a certain position,

'and pneumatic means operable at times to render said continuously actuated means ineffective for holding said control valve in the said position.

v 6. An oil burning apparatus comprising a burner, an oil reservoir'connected to the burner, a source of oil supply connected to the reservoir, a control valve between the reservoir and the source of oil supply, gravity actuated means for normally maintaining said control valve in closed position, and means for supplying air under pressure to the reservoir to force oil therefrom to the 30 burner and to render 'said gravity controlled means ineifeetive for holding said control valve in closed position.

ALBERT PRESTON BROOMELL. 

